Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Gelco Crown Repair: The Fort Worth Owner’s Guide
Gelco crown repair in Fort Worth typically runs $340-$620 installed, depending on whether we’re sealing hairline cracks or replacing a deteriorated crown entirely. We stock Gelco-compatible crown repair materials on our trucks and can usually complete the work on the scheduled visit. Most Fort Worth homeowners discover the problem during a routine sweep or after spotting water stains on the ceiling near the fireplace after a hard rain.
Corrine Halstead, our owner, has handled crown failures across Fort Worth’s older neighborhoods - from Mistletoe Heights to near the Cultural District - where freeze-thaw cycles and the area’s clay-heavy soil settlement stress chimney crowns differently than up north. “The camera doesn’t lie - and neither does the written estimate.”
Which Gelco Models This Applies To
Gelco crowns are found most often on Gelco chimney caps and chase covers installed from the mid-1990s through the mid-2010s, particularly the Gelco Multi-Flue series and the single-flue bolt-down models with integrated crown pans. The critical identifier is the stamped model number on the cap’s skirt or the crown pan itself - usually a format like GMF-1318 or GSF-815. Measure the outside dimensions of your existing crown or cap base; Gelco used 24-gauge galvanized steel for most residential crowns, but the Multi-Flue line jumped to 26-gauge in later production runs, which affects how the repair material bonds.
We source Gelco-compatible crown repair compounds through our Haven buying network, alongside DuraFlex and HeatShield materials. OEM Gelco crown sealant is no longer manufactured, so we use a formulated crown repair mix rated for the expansion coefficients of Gelco’s original galvanized and stainless product lines. Level Two Chimney Fort Worth is an independent service provider - not affiliated with Gelco - and we match repair materials to your specific cap series rather than selling you a full replacement when targeted repair will last.
Signs Your Gelco Crown Repair Is Failing

- Water staining on the ceiling near the chimney breast. Gelco crown pans seal with a bead of high-temp silicone around the flue collar. When that bead hardens in Fort Worth’s summer heat cycles, water tracks down the flue tile and exits at the nearest interior point. We find this most often in homes built 2005-2015 with original Gelco caps.
- Visible rust streaks down the chimney face. The galvanized steel crown pan develops pinhole corrosion where standing water sits. On Gelco units, this starts at the corners where the crown meets the cap skirt - a design seam that traps debris and moisture.
- Crumbled concrete or mortar at the crown’s edge. If your Gelco cap sits on a poured concrete crown (common on masonry chimneys in Fort Worth’s 1920s-1950s housing stock), the concrete deteriorates faster than the metal cap. The repair is crown resurfacing, not cap replacement - a distinction that saves most owners $200-$400.
- Damp or musty odor from the firebox in summer. A failed Gelco crown seal lets humid air into the flue. Fort Worth’s humidity hangs above 60% from May through October, so even small leaks create persistent odor issues that no amount of fireplace cleaning resolves.
- The cap sits crooked or rocks when touched. Gelco caps anchor through the crown into the flue tile or chimney structure. When the crown beneath compresses or spalls, the anchor bolts loosen. This is past the point of sealant repair - the crown needs rebuilding before the cap can be properly re-secured.
Before
AfterReplacement Cost & What’s Included
| Service | Price Range (Fort Worth) | What’s Included |
|---|---|---|
| Gelco crown sealant repair (hairline cracks, intact pan) | $340-$420 | Surface prep, flexible crown repair compound, new flue collar seal, photo documentation |
| Gelco crown resurfacing (spalled concrete, intact pan) | $450-$550 | Grind back to sound material, bonding layer, new crown surface sloped for drainage, photo documentation |
| Gelco crown rebuild with pan replacement | $580-$620+ | Remove cap, form and pour new crown, reinstall or replace pan, new fasteners and seal, full photo record |
The range depends on chimney height (single-story access vs. two-story with steep pitch), crown square footage, and whether the flue tile collar needs replacement. Every price is written and signed before work starts - Haven Standard Clause 1. The 365-Day Done Right Promise covers all crown repair work: if the seal fails or the surface cracks within a year, we return and fix it.
DIY or Call Us?

What you can safely check: from ground level with binoculars, look for the rust streaks, cap tilt, or missing sealant beads described above. Note your Gelco model number if you can read it. That’s the extent of safe homeowner diagnosis.
What goes wrong with DIY crown repair: the compounds sold at hardware stores are formulated for flat concrete, not the thermal expansion of a metal-crowned chimney in Fort Worth’s 100° summer to 20° winter swing. We’ve removed plenty of homeowner-applied patches that cracked within a season and trapped more water than they stopped. Crown work requires ladder or roof access, and the repair surface must be prepped while the chimney is cool - not after a recent fire. For the actual repair, call (682) 499-2712. We bring the right compound for your Gelco series, apply it at proper thickness, and document the finished work under Haven Standard Clause 4.
FAQs
A properly applied crown repair on a Gelco cap typically lasts 8-15 years in Fort Worth’s climate. The freeze-thaw exposure here is milder than northern states, but UV degradation and the area’s occasional ice events stress the sealant. We use compounds rated for 15-year flexural life, and our 365-Day Done Right Promise covers the first year in full. Call (682) 499-2712 for an exact quote - estimates are free.
Most Gelco crowns with surface cracking or minor spalling can be repaired. Full replacement becomes necessary when the crown pan has rusted through, the anchor bolts have pulled out and stripped, or the concrete base has lost more than 40% of its structural depth. We determine this with a camera inspection of the flue interior and physical measurement of the crown - both included in our standard sweep visit. Call (682) 499-2712 for an exact quote - estimates are free.
Most Gelco crown repairs are completed in 2-3 hours of on-site work. We schedule a morning or afternoon block, arrive with materials stocked, and finish in one visit. The compound requires 24-48 hours to cure before the fireplace can be used. You’ll receive timestamped photos of the finished crown and a written warranty before we leave. Call (682) 499-2712 for an exact quote - estimates are free.
Yes - we carry Gelco-compatible crown repair compound, flue collar sealant, and replacement crown pans in common sizes on our Fort Worth trucks. For less common Gelco Multi-Flue configurations, we can source through our Haven buying network within 24-48 hours. We don’t charge a second trip fee if a special-order part is needed. Call (682) 499-2712 for an exact quote - estimates are free.
Written by Corrine Halstead, Owner, Level Two Chimney Fort Worth at Level Two Chimney Fort Worth, serving Fort Worth and nearby areas.





Before
After
Before
After
Before
After